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This paper is focused on challenges related to an increased quantity of distribution energy resources connected to the distribution network within the context of newly defined requirements ENTSO-E, follow-up European standards TS 50549 and codes of distribution system operators on regulation of voltage through control of the reactive power in terms of P-Q diagram. A high number of connected and operated...
Traditional synchronizer cannot control multiple generators in distribution networks in coordination. In this paper, a real-time synchronization control (RTSC) is designed to keep all generators in different standalone distribution networks in synchronization at all times, which realizes a fast and reliable reconnection of disconnected power network. The frequency control and phase control in RTSC...
The worldwide concern about the environments and the moves to dramatically increase the use of renewable energy for the generation of electricity has led to significant emphasis on distributed generation. Distributed generation brings many benefits to both of system operators and consumers, however, there are several difficulties and problems involved when connecting it into the local distribution...
This paper presents a real-time simulation of multi-agent systems for decentralized secondary voltage control method in distribution network. The real-time simulation is performed by using an original platform called “Distributed Energy”. It combines two tools: The first one is a real-time digital simulator for electric power simulation. The second one is a java agent development framework used to...
Currently, for wind generators connected to distribution network, voltage regulation systems are centralized. For a best integration of these distributed generators, the voltage regulation system must also be distributed. In this paper, a decentralization of voltage regulation using multi-agent system technique is proposed. Each agent has a local multi-objective optimization function and controls...
The electricity production field is undergoing a significant change because of both the liberalization of the sector and the policies to support renewable energy sources (RES) and those assimilated to them; in particular, among the latter, the cogeneration technology for civil applications, able to improve the overall energy efficiency, is taken into account in this paper. The electrical generation...
Recently, there has been a considerable increase of distributed generators (DGs) connected to the distribution network. Therefore, the concept of the microgrid has been developed. A microgrid is a cluster of DGs, loads and power storage devices that is typically connected to the distribution network via a single point of connection. Most DGs are connected to the microgrid via a power-electronic inverter...
Most of the dispersed generation systems (DGS) have smaller installation capacity and have to be connected to the distribution network to supply electric power into the utility as well as local loads. When the DG is interconnected in parallel with the utility distribution system, some operating conflicts might arise that affect the system power quality. This paper investigate the effect of DG on the...
For a coordinated integration of the increasing amount of distributed generators in the distribution network, the microgrid has been presented. For the islanded operating condition of the microgrid, the conventional approaches for grid control are no longer applicable as the microgrid characteristics differ significantly from those of conventional power systems. Therefore, in this paper, the reactive...
Increasing penetration of Distributed Generation (DG) in distribution networks significantly changes both the real and reactive power flows in the network and can create serious voltage control problems. Furthermore, traditional Automatic Voltage Control (AVC) schemes that can normally deal with the reverse power flows, are unable to cope with the voltage problems associated with the presence of DG...
The increasing connection of distributed energy generation in a distribution network may lead to unacceptable voltage rise. An automatic voltage reference setting technique, acting on the tap change control of the transformer supplying the network, can be used to address this problem. By measuring essential voltage points along the distribution network, an automatic voltage reference setting technique...
Loss-of-mains (LOM) protection is a safety requirement for distributed generators intending to prevent unintentional islanded operation of a section of the distribution network. With increased numbers of small and medium scale generators connected to the system the correct operation of the LOM protection becomes critical. This paper proposes a new countrywide solution for the detection of islanded...
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